1998 Deville Concours - 400,011 km's / ~250,000 miles does NOT use antifreeze, does NOT overheat or run hot. Tested for around 400km's city and 400 km's of 401 driving (80-160 km/h) still lotsa power. Unfortunatly, car has been retired

Not for the faint hearted, but 30k miles later it is still running great. IIRC The whole thing took three or four long days with two people working on it. Certainly having previous experience doing this job would have reduced the time required, but it is a huge job no matter who you are. I would plan for a full week if you want to do this single-handed.

1999 Deville with 150K with no known head gasket problem. Bought at 90K and always used a QT of oil every 800-1000 miles. Hit a deer and totaled it.

Bought a 1998 Deville with 118K on it. Dreaded P0741 after a few hundred miles. Fixed converter clutch and a two burned clutches for $2300. When I bought it, the dealer said fixed a misfire on cylinder 5 and 7 by replacing just those plugs. I could feel a small miss. Felt just like the problem I fixed after changing wires on my '99. Took a chance - this times the wires did not help at all. Just today I see it dumped a fair amount of coolant on the floor. Have not crawled under it yet, but does not look to be from an area where it could be from a hose. Misfire has gotten worse the last few weeks and dumped coolant - does not look good.

Hmmm. I see from a receipt in the glove box that the prior owner changed the trans fluid and coolant just before selling.

If is the gasket will be looking for an experienced shop in the Minneapolis, MN area. Or maybe just get rid of it. Maybe the expensive tranny is worth something?

Had to get a mirror. It appears that the leak is from the water pump. I think it is on the drives side run by it's own belt. Wet underneath. With the car running water dripping right out of some sort of split in the case.

Still concerned about my mis-fire and have been paranoid about an apparent excess steam from the exhaust - but maybe paranoid. Sorry - discussion not for the link except still paranoid

My 99 STS with 100K miles on it is at Jake's shop as I converse electronically.

I've had it for 5 years, bought it with 60K miles on it. Runs great. CHECK COOLANT LEVEL appeared about a month ago for the very first time. Added coolant then o.k. for a week until same message appeared. Added more coolant and same thing repeated. After adding the third time with no visible coolant loss I pretty much knew it was a HG issue. Combustion gas test confirmed it.

The car has never over-heated while under my ownership, even during this last month of driving with coolant loss. No white smoke either. Car performed as normal. The only sign was a very faint smell of coolant in the car upon start-up and a little miss, also at start-up. Once fired up for a couple of minutes, mis-fire goes way as does coolant smell.

I anxiously await the return of my pearl white beauty from Northstar Performance. I will gladly keep those interested updated with my personal experience with Northstar Performance and their stud solution (although I don't think Jake needs any more positive PR. I found it in abundance on this and other forums thus the reason for choosing Northstar Performance to fix my problem).

My 2000 SLS with 143 on it now
after reading some more posts i actualy do remember about 5 months ago my check Coolant Level Msg came on i put about a half gallon to a gallon of coolant in the MSG went away didn't think about checking it again
and then 5 months latter engines start to heat up to like 245 at times but thenm back down to 190-200 where it should be
the last few days its been running like 200-210 and soemtiems it will get up to 245 and then right back down to 200 with in a second
but coolant level is just fine
wondering where is the coolant go where did it go for it to tell me to check coolant level

i have white smoke comming out first thing when i first start it up but once its warmed up the smoke goes away

waiting for the weekend after easter to come
heaidng up to Jakes with it on the 10th and gona stay in town at a hotel for 2 days he said he should have it back to me by monday wich i hope

Roym so how is your baby after jakes stud kit and work
is it running good again you loving it
please let me know what you ended up spending did you stay near by at a hotel wich one did you pick

Car not back yet due to stud shortage thus can't comment on cost/satisfaction. Supposed to be ready tomorrow. Since I live just outside of Toronto I had my car towed to Jake's and will pick up when ready.

Car not back yet due to stud shortage thus can't comment on cost/satisfaction. Supposed to be ready tomorrow. Since I live just outside of Toronto I had my car towed to Jake's and will pick up when ready.

ah cool cool thanks for the info
i hope he doenst have astud shortage when i get there hope he has all that he needs cause im not gona be able to stay there more then 2 nites already breaking the bank with that yikes

2000 DHS 280,000 miles getting ready to swap in one of Jake's engines d/t the high mileage but blew head gasket on Monday, confirmed by block test. Any body know a reputable source of reliable rebuilt transmissions?